Track Tac

Bully 12 tooth driver with bearing

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bullerman

Member
Anybody bought a new Bully 12 tooth driver with the bearing instead of the bushing. I bought on and put it with a 60 rear sprocket. Adjusted the chain and when I rolled it over it was like the chain wasn't rolling over the sprocket smooth. Took it back off to look at it. On side of the teeth the driver has grooves in it for the chain. Never saw anything like it. I took it off. Anybody else had this kind of trouble.
 

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bullerman said:
Anybody bought a new Bully 12 tooth driver with the bearing instead of the bushing. I bought on and put it with a 60 rear sprocket. Adjusted the chain and when I rolled it over it was like the chain wasn't rolling over the sprocket smooth. Took it back off to look at it. On side of the teeth the driver has grooves in it for the chain. Never saw anything like it. I took it off. Anybody else had this kind of trouble.
Click to expand...

They are all made this way
 
I did change chains and put a new gold chain on it but it did it with the other chain also.
Wonder why they put the ridges on the hub part for the chain to run on. Looks like the teeth would be all it needs.
Have you ever ran a 12 tooth and found it to be smooth?
 

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bullerman said:
I did change chains and put a new gold chain on it but it did it with the other chain also.
Wonder why they put the ridges on the hub part for the chain to run on. Looks like the teeth would be all it needs.
Have you ever ran a 12 tooth and found it to be smooth?
Click to expand...
New drivers, especially the smaller ones seem like they have to be run one time to smooth out. Just about all my small drivers weren’t up to my spec smoothness out the box but were fine after running once/breaking in.
 
bullerman said:
I did change chains and put a new gold chain on it but it did it with the other chain also.
Wonder why they put the ridges on the hub part for the chain to run on. Looks like the teeth would be all it needs.
Have you ever ran a 12 tooth and found it to be smooth?
Click to expand...
It's not made for the chain to "ride" on it, it is scallop clearanced so that the chain doesn't ride on it. It also offers the bearing more support/strength through the driver since the ID is larger. Personally, I prefer the needle bearing drivers over the bushing.
Another thing to look closely at is your outside washer and snap ring. You should be using a small OD outside washer and spiral lock rather than snap ring. This is especially true with the 11T, but I do the same with 12T on our own clutches. The chain has a tendency to ride up on the larger washer or snap ring with 11s and 12s.



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